BMDMs were either stimulated with Mtb antigens for 1 day or left unstimulated, lysed in RIPA Lysis Buffer (Santa Cruz Biotechnology), and heat denatured in reducing sample buffer (Thermo Fisher Scientific). Proteins were separated in 4% to 20% polyacrylamide gradient gels (Bio-Rad) and transferred onto PVDF membranes. Membranes were probed with primary antibodies against IFNAR1 (R&D, Cat#AF3039), and GAPDH (Santa Cruz Biotechnology, Cat# SC-25778) followed by incubation with HRP-conjugated anti–rabbit IgG secondary antibody (Santa Cruz Biotechnology) and developed by Clarity Western ECL Substrate (Bio-Rad).
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